java.util.zip
Class ZipEntry

java.lang.Object
  java.util.zip.ZipEntry

All Implemented Interfaces:

Cloneable, ZipConstants

Direct Known Subclasses:

JarEntry

public class ZipEntry

extends Object

implements ZipConstants, Cloneable

This class is used to represent a ZIP file entry.

Author:

David Connelly

Field Summary

static int	CENATT
static int	CENATX
static int	CENCOM
static int	CENCRC
static int	CENDSK
static int	CENEXT
static int	CENFLG
static int	CENHDR
static int	CENHOW
static int	CENLEN
static int	CENNAM
static int	CENOFF
static long	CENSIG
static int	CENSIZ
static int	CENTIM
static int	CENVEM
static int	CENVER
(package private) String	comment
(package private) long	crc
(package private) long	csize
static int	DEFLATED Compression method for compressed (deflated) entries.
static int	ENDCOM
static int	ENDHDR
static int	ENDOFF
static long	ENDSIG
static int	ENDSIZ
static int	ENDSUB
static int	ENDTOT
static int	EXTCRC
static int	EXTHDR
static int	EXTLEN
(package private) byte[]	extra
static long	EXTSIG
static int	EXTSIZ
(package private) int	flag
static int	LOCCRC
static int	LOCEXT
static int	LOCFLG
static int	LOCHDR
static int	LOCHOW
static int	LOCLEN
static int	LOCNAM
static long	LOCSIG
static int	LOCSIZ
static int	LOCTIM
static int	LOCVER
(package private) int	method
(package private) String	name
(package private) long	offset
(package private) long	size
static int	STORED Compression method for uncompressed entries.
(package private) long	time
(package private) int	version

Constructor Summary

(package private)	ZipEntry(long jzentry)
	ZipEntry(String name) Creates a new zip entry with the specified name.
(package private)	ZipEntry(String name, long jzentry)
	ZipEntry(ZipEntry e) Creates a new zip entry with fields taken from the specified zip entry.

Method Summary

Object	clone() Returns a copy of this entry.
private static long	dosToJavaTime(long dtime)
String	getComment() Returns the comment string for the entry, or null if none.
long	getCompressedSize() Returns the size of the compressed entry data, or -1 if not known.
long	getCrc() Returns the CRC-32 checksum of the uncompressed entry data, or -1 if not known.
byte[]	getExtra() Returns the extra field data for the entry, or null if none.
int	getMethod() Returns the compression method of the entry, or -1 if not specified.
String	getName() Returns the name of the entry.
long	getSize() Returns the uncompressed size of the entry data, or -1 if not known.
long	getTime() Returns the modification time of the entry, or -1 if not specified.
int	hashCode() Returns the hash code value for this entry.
private void	initFields(long jzentry)
private static void	initIDs()
boolean	isDirectory() Returns true if this is a directory entry.
private static long	javaToDosTime(long time)
void	setComment(String comment) Sets the optional comment string for the entry.
void	setCompressedSize(long csize) Sets the size of the compressed entry data.
void	setCrc(long crc) Sets the CRC-32 checksum of the uncompressed entry data.
void	setExtra(byte[] extra) Sets the optional extra field data for the entry.
void	setMethod(int method) Sets the compression method for the entry.
void	setSize(long size) Sets the uncompressed size of the entry data.
void	setTime(long time) Sets the modification time of the entry.
String	toString() Returns a string representation of the ZIP entry.

Methods inherited from class java.lang.Object

equals, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

name

String name

time

long time

crc

long crc

size

long size

csize

long csize

method

int method

extra

byte[] extra

comment

String comment

flag

int flag

version

int version

offset

long offset

STORED

public static final int STORED

Compression method for uncompressed entries.

See Also:

Constant Field Values

DEFLATED

public static final int DEFLATED

Compression method for compressed (deflated) entries.

See Also:

Constant Field Values

LOCSIG

public static final long LOCSIG

See Also:

Constant Field Values

EXTSIG

public static final long EXTSIG

See Also:

Constant Field Values

CENSIG

public static final long CENSIG

See Also:

Constant Field Values

ENDSIG

public static final long ENDSIG

See Also:

Constant Field Values

LOCHDR

public static final int LOCHDR

See Also:

Constant Field Values

EXTHDR

public static final int EXTHDR

See Also:

Constant Field Values

CENHDR

public static final int CENHDR

See Also:

Constant Field Values

ENDHDR

public static final int ENDHDR

See Also:

Constant Field Values

LOCVER

public static final int LOCVER

See Also:

Constant Field Values

LOCFLG

public static final int LOCFLG

See Also:

Constant Field Values

LOCHOW

public static final int LOCHOW

See Also:

Constant Field Values

LOCTIM

public static final int LOCTIM

See Also:

Constant Field Values

LOCCRC

public static final int LOCCRC

See Also:

Constant Field Values

LOCSIZ

public static final int LOCSIZ

See Also:

Constant Field Values

LOCLEN

public static final int LOCLEN

See Also:

Constant Field Values

LOCNAM

public static final int LOCNAM

See Also:

Constant Field Values

LOCEXT

public static final int LOCEXT

See Also:

Constant Field Values

EXTCRC

public static final int EXTCRC

See Also:

Constant Field Values

EXTSIZ

public static final int EXTSIZ

See Also:

Constant Field Values

EXTLEN

public static final int EXTLEN

See Also:

Constant Field Values

CENVEM

public static final int CENVEM

See Also:

Constant Field Values

CENVER

public static final int CENVER

See Also:

Constant Field Values

CENFLG

public static final int CENFLG

See Also:

Constant Field Values

CENHOW

public static final int CENHOW

See Also:

Constant Field Values

CENTIM

public static final int CENTIM

See Also:

Constant Field Values

CENCRC

public static final int CENCRC

See Also:

Constant Field Values

CENSIZ

public static final int CENSIZ

See Also:

Constant Field Values

CENLEN

public static final int CENLEN

See Also:

Constant Field Values

CENNAM

public static final int CENNAM

See Also:

Constant Field Values

CENEXT

public static final int CENEXT

See Also:

Constant Field Values

CENCOM

public static final int CENCOM

See Also:

Constant Field Values

CENDSK

public static final int CENDSK

See Also:

Constant Field Values

CENATT

public static final int CENATT

See Also:

Constant Field Values

CENATX

public static final int CENATX

See Also:

Constant Field Values

CENOFF

public static final int CENOFF

See Also:

Constant Field Values

ENDSUB

public static final int ENDSUB

See Also:

Constant Field Values

ENDTOT

public static final int ENDTOT

See Also:

Constant Field Values

ENDSIZ

public static final int ENDSIZ

See Also:

Constant Field Values

ENDOFF

public static final int ENDOFF

See Also:

Constant Field Values

ENDCOM

public static final int ENDCOM

See Also:

Constant Field Values

Constructor Detail

ZipEntry

public ZipEntry(String name)

Creates a new zip entry with the specified name.

Parameters:

name - the entry name

Throws:

NullPointerException - if the entry name is null

IllegalArgumentException - if the entry name is longer than 0xFFFF bytes

ZipEntry

public ZipEntry(ZipEntry e)

Creates a new zip entry with fields taken from the specified zip entry.

Parameters:

e - a zip Entry object

ZipEntry

ZipEntry(String name,
         long jzentry)

ZipEntry

ZipEntry(long jzentry)

Method Detail

initIDs

private static void initIDs()

initFields

private void initFields(long jzentry)

getName

public String getName()

Returns the name of the entry.

Returns:

the name of the entry

setTime

public void setTime(long time)

Sets the modification time of the entry.

Parameters:

time - the entry modification time in number of milliseconds since the epoch

See Also:

getTime()

getTime

public long getTime()

Returns the modification time of the entry, or -1 if not specified.

Returns:

the modification time of the entry, or -1 if not specified

See Also:

setTime(long)

setSize

public void setSize(long size)

Sets the uncompressed size of the entry data.

Parameters:

size - the uncompressed size in bytes

Throws:

IllegalArgumentException - if the specified size is less than 0 or greater than 0xFFFFFFFF bytes

See Also:

getSize()

getSize

public long getSize()

Returns the uncompressed size of the entry data, or -1 if not known.

Returns:

the uncompressed size of the entry data, or -1 if not known

See Also:

setSize(long)

getCompressedSize

public long getCompressedSize()

Returns the size of the compressed entry data, or -1 if not known. In the case of a stored entry, the compressed size will be the same as the uncompressed size of the entry.

Returns:

the size of the compressed entry data, or -1 if not known

See Also:

setCompressedSize(long)

setCompressedSize

public void setCompressedSize(long csize)

Sets the size of the compressed entry data.

Parameters:

csize - the compressed size to set to

See Also:

getCompressedSize()

setCrc

public void setCrc(long crc)

Sets the CRC-32 checksum of the uncompressed entry data.

Parameters:

crc - the CRC-32 value

Throws:

IllegalArgumentException - if the specified CRC-32 value is less than 0 or greater than 0xFFFFFFFF

See Also:

setCrc(long)

getCrc

public long getCrc()

Returns the CRC-32 checksum of the uncompressed entry data, or -1 if not known.

Returns:

the CRC-32 checksum of the uncompressed entry data, or -1 if not known

See Also:

getCrc()

setMethod

public void setMethod(int method)

Sets the compression method for the entry.

Parameters:

method - the compression method, either STORED or DEFLATED

Throws:

IllegalArgumentException - if the specified compression method is invalid

See Also:

getMethod()

getMethod

public int getMethod()

Returns the compression method of the entry, or -1 if not specified.

Returns:

the compression method of the entry, or -1 if not specified

See Also:

setMethod(int)

setExtra

public void setExtra(byte[] extra)

Sets the optional extra field data for the entry.

Parameters:

extra - the extra field data bytes

Throws:

IllegalArgumentException - if the length of the specified extra field data is greater than 0xFFFF bytes

See Also:

getExtra()

getExtra

public byte[] getExtra()

Returns the extra field data for the entry, or null if none.

Returns:

the extra field data for the entry, or null if none

See Also:

setExtra(byte[])

setComment

public void setComment(String comment)

Sets the optional comment string for the entry.

Parameters:

comment - the comment string

Throws:

IllegalArgumentException - if the length of the specified comment string is greater than 0xFFFF bytes

See Also:

getComment()

getComment

public String getComment()

Returns the comment string for the entry, or null if none.

Returns:

the comment string for the entry, or null if none

See Also:

setComment(String)

isDirectory

public boolean isDirectory()

Returns true if this is a directory entry. A directory entry is defined to be one whose name ends with a '/'.

Returns:

true if this is a directory entry

toString

public String toString()

Returns a string representation of the ZIP entry.

Overrides:

toString in class Object

Returns:

a string representation of the object.

dosToJavaTime

private static long dosToJavaTime(long dtime)

javaToDosTime

private static long javaToDosTime(long time)

hashCode

public int hashCode()

Returns the hash code value for this entry.

Overrides:

hashCode in class Object

Returns:

a hash code value for this object.

See Also:

Object.equals(java.lang.Object), Hashtable

clone

public Object clone()

Returns a copy of this entry.

Overrides:

clone in class Object

Returns:

a clone of this instance.

See Also:

Cloneable